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Finding the Fourth Proportional to 1,365.88, 1,885 and 841.94

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Solution

The fourth proportional to 1,365.88, 1,885 and 841.94 is: 1,161.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,365.88 : 1,885 = 841.94 : x
  2. Step 2: Convert to fraction form
    1,365.88/1,885 = 841.94/x
  3. Step 3: Cross multiply
    1,365.88x = 1,885 × 841.94
  4. Step 4: Simplify right side
    1,365.88x = 1,587,056.90
  5. Step 5: Solve for x
    x = 1,587,056.90/1,365.88
  6. Step 6: Final answer
    x = 1,161.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.